91321096 has 8 divisors (see below), whose sum is σ = 171227070. Its totient is φ = 45660544.

The previous prime is 91321081. The next prime is 91321099. The reversal of 91321096 is 69012319.

It can be written as a sum of positive squares in only one way, i.e., 82992100 + 8328996 = 9110^2 + 2886^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (91321099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5707561 + ... + 5707576.

Almost surely, 2^91321096 is an apocalyptic number.

It is an amenable number.

91321096 is a deficient number, since it is larger than the sum of its proper divisors (79905974).

91321096 is a wasteful number, since it uses less digits than its factorization.

91321096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11415143 (or 11415139 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 91321096 is about 9556.2071974189. The cubic root of 91321096 is about 450.3225605026.

The spelling of 91321096 in words is "ninety-one million, three hundred twenty-one thousand, ninety-six".